the harry potter books___pretty popular since they were published.为什么答案是have become .become不是短暂性动词吗?怎么能与since从句搭配吧?

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theharrypotterbooks___prettypopularsincetheywerepublished.为什么答案是havebecome.become不是短暂性动词吗?怎么能与since从

the harry potter books___pretty popular since they were published.为什么答案是have become .become不是短暂性动词吗?怎么能与since从句搭配吧?
the harry potter books___pretty popular since they were published.为什么答案是have become .
become不是短暂性动词吗?怎么能与since从句搭配吧?

the harry potter books___pretty popular since they were published.为什么答案是have become .become不是短暂性动词吗?怎么能与since从句搭配吧?
答案应该是have been,不是 have become,因为短暂性动词 / 瞬间动词不能与since连用.
你的观察力很好.这是你以后成功的基础.祝你天天向上.

在since +时间状语（从句）的句子中，主句要用现在完成时。become是短暂性动词，但它可以用于现在完成时中，只是此种情况下后面不能与表示一段的时间状语连用。如我们不可以用the harry potter books has become pretty popular for five years.since从句也是时间段啊，become用在这里也不合适啊since从句表示的是从过去的某一个时...

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在since +时间状语（从句）的句子中，主句要用现在完成时。become是短暂性动词，但它可以用于现在完成时中，只是此种情况下后面不能与表示一段的时间状语连用。如我们不可以用the harry potter books has become pretty popular for five years.

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